Power hammer



2 Sheets-Sheet l Q thou buy M. S. REED POWER HAMMER Filed NOV. 12.- ,924

Dec. 20, 1927.

Patented Dec. 20, 1927 UNITED STATES 1,653,509 PATENT OFFICE- MACDONALD S. REED, OF ERIE, PENNSYLVANIA, ASSIGNOR TO ERIE FOUNDRY COM- PANY, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA. v

POWER HAMMER.

Application filed November 12, 1924. Serial No. 749,477.

This invention is desi ned to improve board drop hammers. of such hammers have heretofore been driven by gears but in such instances the gears have ordinarily had their relation varied as the rollers were adjusted to and from the board. In the present invention I maintain the pitch relation of the gears constant. It is desirable with heavy duty hammers to supply a plurality of pairs of friction rollers so that the pressure on the board may be distributed. In the present invention-this is accomplished and at the same time the rolls of the two pairs are mounted on eveners so that the frictional engagement of both pairs of rolls is equal. Details and features of the invention willfurther appear from the specifica tion and claims.

The invention is illustrated in the accompanying drawings as follows Fig. 1 shows a front elevation of a drop hammer. v

Fig. 2 Fig. V i

Fig. 3 a side elevation of the roll mechanism of the drop hammer, parts being broken away to better show construction.

1 marks the anvil, 2 the frame, 3 the sow block, 4 the ram, 5 the guides in the frame for the ram, and 6 the boards secured to the ram in the usual manner. A cap 2 is arranged at the top of the frame and forms the frame for the friction rolls. The friction a section on the line 22 in rolls are arranged in pairs, the rolls 7 and 9 forming the top pair and the rolls 8 and the lower pair. The rolls 9 and 10 are mounted on eveners 11. These eveners are journaled on an oscillating mounting 12 co centrically mounted in bearings 13 in the cap 2. By swinging the eccentric or mounting 12 the eveners 11 carrying the rolls 9 and 10 are moved to and from the board. The rolls 9 and 10 are carried by shafts 9 and 10 journaled in the ends of the eveners.

The rolls 7 and 8 are mounted on shafts 7 and 8 and these shafts are journaled in eveners 14 similar to the eveners 11 and the eveners 14 are mounted on an eccentric mounting 15, the mounting being journaled in bearings 15 in the frame. The eccentric 12 has an arm 16 by means of which the rolls 9 and 10 aremoved toward and'from the board. An operating rod 17 is secured to the arm 16 and is operated by the lift lever 18 for disengaging the rolls and is The friction rollers released or dropped by a latch 19 in the usual manner when the hammer reaches its lower position. These parts operate in the usual manner of hammers of this type and are well understood.

An arm 20 extends from the eccentric 15 and has an adjusting. mechanism (not shown) secured to an eye 21 so-that it may be adjusted for wear. Otherwise this eccentric remains stationary in the ordinary operation of the machine.

A drive wheel 22 is mounted on a shaft 23. The shaft 23 extends through and is journaled in the eccentric 12 and is concern trio with the eveners 11. A gear 24 is fixed on the shaft 23 at the opposite end from the wheel 22 and meshes with gears 25 and 26 on the shafts 9 and 10 respectively. In this way the rolls 9 and 1 0 are gear driven and it will be noted that inasmuch as the shafts 9 and 10 remain in constant relat-ion to the shaft 23 the pitch relation of'the gears remain constant. A drive pulley 27 is mounted on a shaft 28 mounted in the eccentric 15 in a manner similar to the shaft 23 and is concentric to the eveners 14. A gear 29 shown in dotted lines in Fig. 3 is fixedon the shaft 28 and meshes with gears 30 and 31 on the shafts 7 and 8 In this way the friction rolls 7 (and 8 are geardriven and in this gear connection as in the one involving the gears 24, 25 and 26, the

pitch relation remains constant.

With this structure through the action of the eveners equal pressure is delivered to the board at different points in the movement of the board even though the board in service may become somewhat varying in thickness andv this result is accomplished without in any way disturbing the even driving of the rolls.

What I claim as new is 1. In a power hammer, the combination of an operating board; two movable ac;- tuating friction rolls; shafts on which said movable friction rolls are mounted; two rolls opposing the movable rolls; an evener in which said shafts are journaled; an eccentric on which theevener is mounted; av

drive shaft mounted in the eccentric, said drive shaft being concentric with the evener;

and gears on said shafts, said gears being in driving relation. 1 v 2. In a power hammer, the combination of an operating board; a set of two movable rolls atone sideof the board; a set of two opposing rolls at the opposite side of the board; an evener on which the movabie rolls are mounted comprising a swinging frame having its aXis in-a plane at right angles to the board and between the movable rolls;

v means moving the evener bodily to move the movable rolls; and means for driving one of sa1d rolls.

3. In a power hammer, the combination of an operating board; a set of two movable rollsjat one side of the boardg'a set of two opposingrolls'at the opposite side of the board; an evener on which the movable roiis are mounted comprising a swinging frame having-its axis in a plane at rlght angies to the board and between the movable rolls; ane'ccentrioon which the evener is'mounted;

means actuating the eccentric to move the evener and with the evener the rolls toward and from the board; trIlCill'iBlIlS actuating one of the rolls. 1

a. In a power hammer, the combination of'an operating board; a set of two aotuating'movable friction rolls at one side of -'the board; a set of two opposing rolls mounted at the opposite side of the board;

an eveneronwhich the movable rolls are mounted comprising a swinging frame havi-ng its axis in a plane at right angles to the board and between the movablerolls; means moving the evener bodily to move the movablerol'ls into engagement with 'theboard;

and means driving the actuating rolls.

"5.Inapower hammer, the combination of an operating 'boardi aset of two actuatingmovable friction-rolls at one side of the board; a set of "two opposingroli's -mountedat the opposite side of theboard;

an'evener'on which the movabie rolls are mounted comprisinga swinging frame having its axis in a plane at right angles to the board and between the movable rolls; means moving the evener bodily to move the movable rolls into engagement with the board;

and means driving the actuating rolls comprising a gear system havinga; gear concentrio with the evener and a gear on an actuating roll.

6. In a power hammer, the combination of an operating board; two sets of two frichaving its axis in a plane at rightangles to the board and between the rollsmounted thereon; and means for moving-the evener-s toward and from the board comprising 'ec-' centrics on which the eveners are mounted.

8.. In a power hammer, the combination of an operating board; two sets-'ot'two friction rolls at each side of 'theboard; two eveners one for each set of roilson which said sets are mounted,-each evener comprising a swinging frame having its axis ina plane at right angles to the board arid-between the rolls carried by the frame; in'eans I for moving the eveners toward and om the board; and gear driving inechamsnis tor said rollshaving driving gears concentric with the'axis of the evenersmeshing' with gears concentric with the rolls.

In, testimony i whereof I- have jhereuntoset my hand.

MACDONALD S. REED. 

